WASHINGTON — President Donald Trump’s fiscal 2019 budget would give service members a 2.6 percent pay raise and add 16,400 more troops to the services’ end strength, according to documents from the White House. The $686 billion defense spending plan does not match exactly with the budget deal agreed upon by Congress last week, but gives an outline of the administration’s military priorities looking ahead to next year. Lawmakers still have to finalize their fiscal 2018 spending plans before debating how the fiscal 2019 money should be allotted. The 2.6 percent pay raise proposal would be the highest troops have seen since 2010, and matches the expected growth in private sector wages for next year. That’s significant because Pentagon planners for the last several years have suggested trims to that pay raise formula, to create savings for other modernization and readiness pri...